What method is advised for incorporating pesticides into the soil?

Incorporating pesticides into the soil is often best achieved through mechanical tilling, provided that the pesticide label permits this method. This practice helps to ensure that the pesticide is adequately mixed with the soil, which can enhance its effectiveness against pests and diseases. Mechanical tilling breaks up the soil and allows for thorough integration of the pesticide, facilitating better absorption and activation by soil microorganisms.

Using this method also helps to minimize runoff and leaching, which can occur if pesticides remain on the surface of the soil. It can also prevent potential harm to non-target organisms and reduce volatility associated with certain pesticides. Adhering to the manufacturer's label is crucial since it provides specific guidance on the appropriate methods of application, including any restrictions on tilling.

Other methods mentioned, such as just spraying in dry conditions or deep watering after application, may not provide the same level of efficacy since pesticides can be more effectively utilized when they are mixed within the soil matrix. Covering the area with plastic for weeks is not typically a recommended approach either, as it may impede the necessary interaction between the pesticide and soil, as well as potentially create unfavorable conditions for plant growth and soil health.